The AS 1717, which debuted around 1963, was one of the most flat
self-winding movements of
its time. When a height of only 4mm, it was perfect for being used in the ultra-modern
ultra flat gold watches of the sixties.
|movement view without rotor|
Such a small height was possible, since the whole self-winding mechanisms was
integrated as a module into the movement and not put as an additional plate onto it.
The self-winding module used here is a simple construction: The rotor drives a gear (not
shown here), which drives the ratchet wheel. This wheel guarantees, in addition with a click spring,
that the rotor only winds in one direction and is decoupled when the movement is hand wound.
The self-winding module can be removed by releasing only two
screws and uses a whole of seven
jewels wherever possible.
|selfwinding mechanism, flipped over|
AS experimented in the sixties with different self-winding systems and wanted to find
out whether a bidirectional winding rotor was superiors to an unidirectional winding rotor.
Since all later AS self-winding movements were unidirectional winding ones, it seems, as if
this combination was not only cheaper and more reliable, but as more or at least as effective
as a bidirectional winding system.
|movement view without
The rest of the movement also was very modern for its time - it already uses a decentral
minute wheel which indirectly drives the center minute hand and is beared in two synthetic
This construction allowed the usage of a very large balance and of a very large mainspring
barrel - both guarantee (together with the Glucydur balance and the blue Nivarox hairspring of
the specimen shown here) best precision results.
The center second hand is directly driven and the hairspring stud is moveable. The effective
length of the hairspring is regulated by a short regulator arm.
|date indication mechanism|
The AS 1717 uses an instantly switching date indication which can be corrected semi-fast
by turning the hands back and forth.
The date mechanism, as common on AS movements, is very elaborate:
The date wheel at "6" drives a hammer mechanism at "7" and creates tension there. At midnight, the
tension is released immediately and advances the date ring.
|Number of jewels||
Anchor with pallets|
|Balance cock direction||
Escapement wheel, Fourth wheel, Third wheel, Large driving wheel
Hour, minute, second, day, self-winding|
|Beats per hour||
|Image in Flume Werksucher ||